I am not sure on the RWY lengths, i would say they are at least 750 meters.
I have the name of the two guys that own the land, i am just waiting for a number now. I have been told there is a £10 landing fee for singles and £20 for twins.
When you land there you need to sign in and out, you also need to fill in a customs form while there and don't forget special branch.
As for fuel there is none there, but i know a guy that might sell some and bring it up in Jerry cans. Mind you during TT he takes his bowser up there.